Efficiency of using the formula of feed additives based on local raw materials for heifers in the conditions of Yakutia

Abstract

The article presents the results of experience in using the formulation of feed additives based on local raw materials for heifers. The positive effect of using the formulation of feed additives from local raw materials in the diets of heifers on the digestibility and absorption of nutrients has been proven. Full-fledged feeding of Simmental heifers, using the recipe for feed additives No. 1, ensured normal development and made it possible to increase the digestibility of feed nutrients. The digestibility of dry matter ranged from 67.01 to 72.08%, crude protein - from 50.28 to 60.61%, fiber - from 60.22 to 64.22%. Good absorption of calcium and phosphorus was noted in all groups. The features of feed consumption, feed digestibility and energy use of Simmental heifers have been studied. Thus, the experimental animals of the control group consumed gross energy less by 3.0 and 3.5 MJ, and also digested less energy by 0.3 and 2.6 MJ with the same digestibility. In this regard, with comparatively equal energy losses, the yield of exchangeable energy in heifers of the I-experimental group was higher by 2.8 and 3.3 MJ in comparison with their peers. This indicates a more intensive energy exchange in heifers of the I-experimental group, which contributed to the absorption of nutrients and the containment of microbiological imbalances.